Britney Spears -- Dark Side of the Moon

6/4/2007 2:05 PM PDT

Britney Spears -- Dark Side of the Moon

The Britster was vacationing in Puerto Vallarta this weekend, she tried to leave a bit to the imagination -- like actual singing in her recent lip-synched mini-concert tour. Brit offered the paps a flash of her well-documented junk.First off, the hair extensions, not that they ever looked good, are now absolutely whorendous -- they look like she's got dried guacamole in there.

Still, Spears was all smiles for paparazzi just before flashing a chunk of butt. Adios, y'all!